Saturday

September 20, 2014

September 20, 2014

Posted by **jenn** on Wednesday, March 30, 2011 at 10:05pm.

If the locomotive can exert a constant pull

of 4.9×105 N, how long does it take to increase

the speed of the train from rest to 74 km/h?

Answer in units of min.

- physics -
**bobpursley**, Wednesday, March 30, 2011 at 10:48pmF=ma

a=F/m

vf=at

t= vf/a=vf*m/Force

change vf to m/s, and you have it.

**Answer this Question**

**Related Questions**

Physics - A freight train has a mass of 1.2 107 kg. If the locomotive can exert ...

Physics - A freight train has a mass of 1.7 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 1.4 107 kg. If the locomotive can exert...

physics - A freight train has a mass of 1.5 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 6.5 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 5 x 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 1.2 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 1.9 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 3.1 × 107 kg. If the locomotive can ...

physics - A freight train has a mass of 3.2 × 107 kg. If the locomotive can ...